Fix a minor bug.This branch should now be stable

By stable I mean ready to merge.

What was the minor bug , you may ask?

Function shiftArgsDownward returns the slice , and does not modify it.

Previously Args was not set to shiftArgsDownward(Args) , so it stayed
unmodified

Yes , future me I ran go fmt

main.go

@@ -47,7 +47,7 @@ func (c *Cli) Setup() {
 		if contains(os.Args[1], c.AcceptedCommands) {
 			Command = os.Args[1]
 			Args = os.Args
-			shiftArgsDownward(Args)
+			Args = shiftArgsDownward(Args)
 		} else {
 			fmt.Println("Command not found: ", os.Args[1])
 		}